Python - Release Event from Canvas

[Grum999]

@AkiR

Extension.setup() is called before first window is created so Application.activeWindow() is None!
You can try to delay setup… something like:

In Krita 5 you can use Notifier windowCreated() to be sure to get a window before doing stuff

(The event already exist in Krita 4 but it doesn’t work properly, it seems it was a choice to fix it in Krita 5 only)

Grum999